Adjustable brake-head.



P. B. HARRISON.

ADJUSTABLE BRAKE HEAD.

APPLICATION FILED 11017.22, 1911.

1 059 3 0 Patented Apr.22, 1913.

Wmvessas INVENTOR W I PHILIP B. H /501v f avg 'fi STATES PATENT. OFFICE.

PHILIP B. HARRISOIU OF iCHIGAGO, ILLINOIS, ASSIGNOR ;TO CHICAGO RAILWAYiEQUIPMENT COMPANY, OF. CHICAGO; ILLINOIS, A CORPORATION OF ILLINOIS.

ADJUSTABLE BRAKEFHEAD.

Specification of Letters Patent.

To all whom it may concern Be it known that I, PHILIP B. HARRISON, acitizen of the United.States,residing at Chicago, Illinois, haveinvented a certain new and useful Improvement: in AdjustableBrake-Heads, of which the following is a full, clear, and exactdescription, such a as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanyingdrawings, forming part of this specificatiom; in which-.-

Figure 1 is a side elevational view partly in section ofmy improvedadjustable brake head. Fig. 2 is a topplan view of the same.

This invention relates to. a new and useful improvement in adjustablebrake heads,

the object being to construct a brake head with comparatively few numberof aparts, the entire rear wall of which is removable whereby the headcanbe assembled onthe part of the beamuponwhich it is mounted by alateral movement and without requiring that the head he slippedlongitudinally over the end of the beam. The rear wall is in the form ofa strapseparable from the brake head, each endof which strap cooperateswith means whereby the strap is drawn inwardly toward the head to clampthe head in adjusted position.

In the drawings: 1. indicates the brake head,the rear wall of which iscut away;

2 is a strapformingthe rear wall, said strap preferably having narrowedtongue portions 2 at eachend provided withopenings for wedge keys 3.These wedge keys pass through suitable openings in flanges 1*1 in thehead and when the parts are assembled on the brake beam and the headadjusted to its proper position,jthe wedge keys are driven home drawingthe strap inwardly towardtthe head and clamping the head to the beam 4.The smallerends of the wedge keys may be then bent: down to preventaccidental displacement thereof.

It is obvious that instead, of having two wedge keys one at each end ofthe strap, the

strap may bepivotally secured to the head atone end and provided with awedge key at its other end. Theback ofthe brake head is provided with asemiecircular recess in which the cylindrical portion of thebeam is.seated, the strap being U shape and embracing the cylindrical. portionof the beam. The cylindrical portion of the beam, as is usual withso-called adjustable brake heads, is provided with a groove in its rearwall? in the bottom of which are arranged serra tions 5 forcooperatingwith a projection: 6.

having a;serrated face constituting a looking, surface, said pro ectionextending jfOIi wardly from the strap and cooperating with serrations 5of the beam. In this manner:

the brake head can adjust itself to the wheel when the brakesare appliedwhile the wedge 1 keys are loose, after which the wedge; keys may bedriven home and their smaller ends.

bent over so as to rigidly lockthe adjusted brake heads inproperposition.

What I claim is 1. Abrake head having a semi-circular recess in its backfor receiving a cylindrical part of the brake beam on which said head ismounted, a transversely extendingmow able part embracing the brake beamand havinglocking engagement with the cylin Patented Apr. 22,1915

clrical portion of the beam, and means c0 operating: with each end ofsaid movable J part to draw the same forwardly and lin-f wardlyto takeup wear.

2. A brake head having a removable rear wall provlded w1th a lockingsurface for en-i gagement with the beam and a wedge key cooperating withone end of said wall and i the brake head for drawing said wall to-.

ward the brake head.

3. A. brake head having a removable rear wall and wedge keys cooperatingwitheach end of said wall for drawing the same to ward the brake head.

4. A brake head having a seat for a brake beam in its rear face, a strapembracingthe brake beam, said strap having reduced ends and meanscooperating with said reduced ends for drawing the strap toward thebrake head andlclamping the beam in positiona so as to take up wear andprevent rattlingof the parts.

In testimony whereof I hereunto aflixmy. signature lIlithe presence oftwo witnesses,

this 17 day of November, 1911.

PHILIP B. HARRISON lVit-nesses: Eow. T. WALKER, M.F. HUN'rooN.

Copies of this patent may be. obtained for

